Text area cut line (#5374)

* Updating the behaviour of cut in the TextArea to cut the whole line if there is no selection

* Update bindings in TextArea

* Tidying up, remove unused action, include cut/copy/paste in keybinds table

* Docs fix

* Changelog

Author: darrenburns

CHANGELOG.md

@@ -10,16 +10,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 
 - Added `App.clipboard` https://github.com/Textualize/textual/pull/5352
-- Added standard cut/copy/paste (ctrl+x, ctrl+c, ctrl+v) bindings to Input / TextArea https://github.com/Textualize/textual/pull/5352
+- Added standard cut/copy/paste (ctrl+x, ctrl+c, ctrl+v) bindings to Input / TextArea https://github.com/Textualize/textual/pull/5352 & https://github.com/Textualize/textual/pull/5374
 - Added `system` boolean to Binding, which hides the binding from the help panel https://github.com/Textualize/textual/pull/5352
 - Added support for double/triple/etc clicks via `chain` attribute on `Click` events https://github.com/Textualize/textual/pull/5369
 - Added `times` parameter to `Pilot.click` method, for simulating rapid clicks https://github.com/Textualize/textual/pull/5369
 
 ### Changed
 
 - Change default quit key to `ctrl+q` https://github.com/Textualize/textual/pull/5352
-- Changed delete line binding on TextArea to use `ctrl+shift+x` https://github.com/Textualize/textual/pull/5352
 - The command palette will now select the top item automatically https://github.com/Textualize/textual/pull/5361
+- `ctrl+shift+k` now deletes the current line in `TextArea`, and `ctrl+x` will cut
+the selection if there is one, otherwise it will cut the current line https://github.com/Textualize/textual/pull/5374
 - Implemented a better matching algorithm for the command palette https://github.com/Textualize/textual/pull/5365
 
 ### Fixed

src/textual/widgets/_text_area.py

@@ -226,7 +226,6 @@ class TextArea(ScrollView):
         Binding(
             "ctrl+f", "delete_word_right", "Delete right to start of word", show=False
         ),
-        Binding("ctrl+shift+x", "delete_line", "Delete line", show=False),
         Binding("ctrl+x", "cut", "Cut", show=False),
         Binding("ctrl+c", "copy", "Copy", show=False),
         Binding("ctrl+v", "paste", "Paste", show=False),
@@ -239,9 +238,14 @@ class TextArea(ScrollView):
             "Delete to line end",
             show=False,
         ),
+        Binding(
+            "ctrl+shift+k",
+            "delete_line",
+            "Delete line",
+            show=False,
+        ),
         Binding("ctrl+z", "undo", "Undo", show=False),
         Binding("ctrl+y", "redo", "Redo", show=False),
-        Binding("ctrl+c", "copy_selection", "Copy selected text", show=False),
     ]
     """
     | Key(s)                 | Description                                  |
@@ -268,13 +272,16 @@ class TextArea(ScrollView):
     | ctrl+w                 | Delete from cursor to start of the word.     |
     | delete,ctrl+d          | Delete character to the right of cursor.     |
     | ctrl+f                 | Delete from cursor to end of the word.       |
-    | ctrl+shift+x           | Delete the current line.                     |
+    | ctrl+shift+k           | Delete the current line.                     |
     | ctrl+u                 | Delete from cursor to the start of the line. |
     | ctrl+k                 | Delete from cursor to the end of the line.   |
     | f6                     | Select the current line.                     |
     | f7                     | Select all text in the document.             |
     | ctrl+z                 | Undo.                                        |
     | ctrl+y                 | Redo.                                        |
+    | ctrl+x                 | Cut selection or line if no selection.       |
+    | ctrl+c                 | Copy selection to clipboard.                 |
+    | ctrl+v                 | Paste from clipboard.                        |
     """
 
     language: Reactive[str | None] = reactive(None, always_update=True, init=False)
@@ -2185,6 +2192,10 @@ def action_delete_right(self) -> None:
 
     def action_delete_line(self) -> None:
         """Deletes the lines which intersect with the selection."""
+        self._delete_cursor_line()
+
+    def _delete_cursor_line(self) -> EditResult | None:
+        """Deletes the line (including the line terminator) that the cursor is on."""
         start, end = self.selection
         start, end = sorted((start, end))
         start_row, _start_column = start
@@ -2201,25 +2212,26 @@ def action_delete_line(self) -> None:
         deletion = self._delete_via_keyboard(from_location, to_location)
         if deletion is not None:
             self.move_cursor_relative(columns=end_column, record_width=False)
+        return deletion
 
     def action_cut(self) -> None:
         """Cut text (remove and copy to clipboard)."""
         if self.read_only:
             return
         start, end = self.selection
         if start == end:
-            return
-        copy_text = self.get_text_range(start, end)
-        self.app.copy_to_clipboard(copy_text)
-        self._delete_via_keyboard(start, end)
+            edit_result = self._delete_cursor_line()
+        else:
+            edit_result = self._delete_via_keyboard(start, end)
+
+        if edit_result is not None:
+            self.app.copy_to_clipboard(edit_result.replaced_text)
 
     def action_copy(self) -> None:
         """Copy selection to clipboard."""
-        start, end = self.selection
-        if start == end:
-            return
-        copy_text = self.get_text_range(start, end)
-        self.app.copy_to_clipboard(copy_text)
+        selected_text = self.selected_text
+        if selected_text:
+            self.app.copy_to_clipboard(selected_text)
 
     def action_paste(self) -> None:
         """Paste from local clipboard."""
@@ -2310,10 +2322,6 @@ def action_delete_word_right(self) -> None:
 
         self._delete_via_keyboard(end, to_location)
 
-    def action_copy_selection(self) -> None:
-        """Copy the current selection to the clipboard."""
-        self.app.copy_to_clipboard(self.selected_text)
-
 
 @lru_cache(maxsize=128)
 def build_byte_to_codepoint_dict(data: bytes) -> dict[int, int]:

tests/text_area/test_edit_via_bindings.py

@@ -167,6 +167,57 @@ async def test_delete_right_end_of_line():
         assert text_area.text == "helloworld!"
 
 
+@pytest.mark.parametrize(
+    "selection,expected_result,expected_clipboard,cursor_end_location",
+    [
+        (Selection.cursor((0, 0)), "", "0123456789", (0, 0)),
+        (Selection.cursor((0, 4)), "", "0123456789", (0, 0)),
+        (Selection.cursor((0, 10)), "", "0123456789", (0, 0)),
+        (Selection((0, 2), (0, 4)), "01456789", "23", (0, 2)),
+        (Selection((0, 4), (0, 2)), "01456789", "23", (0, 2)),
+    ],
+)
+async def test_cut(selection, expected_result, expected_clipboard, cursor_end_location):
+    app = TextAreaApp()
+    async with app.run_test() as pilot:
+        text_area = app.query_one(TextArea)
+        text_area.load_text("0123456789")
+        text_area.selection = selection
+
+        await pilot.press("ctrl+x")
+
+        assert text_area.selection == Selection.cursor(cursor_end_location)
+        assert text_area.text == expected_result
+        assert app.clipboard == expected_clipboard
+
+
+@pytest.mark.parametrize(
+    "selection,expected_result",
+    [
+        # Cursors
+        (Selection.cursor((0, 0)), "345\n678\n9\n"),
+        (Selection.cursor((0, 2)), "345\n678\n9\n"),
+        (Selection.cursor((3, 1)), "012\n345\n678\n"),
+        (Selection.cursor((4, 0)), "012\n345\n678\n9\n"),
+        # Selections
+        (Selection((1, 1), (1, 2)), "012\n35\n678\n9\n"),
+        (Selection((1, 2), (2, 1)), "012\n3478\n9\n"),
+    ],
+)
+async def test_cut_multiline_document(selection, expected_result):
+    app = TextAreaApp()
+    async with app.run_test() as pilot:
+        text_area = app.query_one(TextArea)
+        text_area.load_text("012\n345\n678\n9\n")
+        text_area.selection = selection
+
+        await pilot.press("ctrl+x")
+
+        cursor_row, cursor_column = text_area.cursor_location
+        assert text_area.selection == Selection.cursor((cursor_row, cursor_column))
+        assert text_area.text == expected_result
+
+
 @pytest.mark.parametrize(
     "selection,expected_result",
     [
@@ -184,7 +235,7 @@ async def test_delete_line(selection, expected_result):
         text_area.load_text("0123456789")
         text_area.selection = selection
 
-        await pilot.press("ctrl+shift+x")
+        await pilot.press("ctrl+shift+k")
 
         assert text_area.selection == Selection.cursor((0, 0))
         assert text_area.text == expected_result
@@ -219,7 +270,7 @@ async def test_delete_line_multiline_document(selection, expected_result):
         text_area.load_text("012\n345\n678\n9\n")
         text_area.selection = selection
 
-        await pilot.press("ctrl+shift+x")
+        await pilot.press("ctrl+shift+k")
 
         cursor_row, cursor_column = text_area.cursor_location
         assert text_area.selection == Selection.cursor((cursor_row, cursor_column))